Drum for liquids and semi-liquids



Dec. 25, 1956 H. A. BERGSTROM 2,775,384

DRUM FOR LIQuIdS AND sEMx-Lmurns Filed Jiy 27, 1951 4 v INVENTOR ramla egnsfawz/ ATTORNEYS United States Patent O DRUM FR LIQUIDS AND SEMI-LIQUIDS Harold A. Bergstrom, Van Wert, Ohio, assignor to Continental Can Company, Inc., New York, N. Y., a corporation of New York Application July 27, 1951, Serial No. 238,789

1 Claim. (Cl. Z29--5.5)

The invention relates to new and useful improvement-s in heavy duty fiber drums of large capacity and especially adapted for storing and shipping `of liquid or semi-liquid products.

An object of the invention is to construct a heavy duty ber drum wherein the body is convolutely wound and has incorporated therein -a ply of metal for preventing puncturing or rupturing during handling land shipping.

A further object of the invention is to provide a ber drum of `the above type wherein the bottom heading is constructed so as to prevent puncturing during handling and shipping.

ln the drawings:

Figure l is a vertical sectional view through a formed cylinder having -a metal ply imbedded therein, which cylinder is to form the body wall of the improved liber drum;

Figure 2 is a view showing diagrammatically the method of forming lthe cylinder and incorporating the metal ply therein;

Figure 3 is la sectional view through the upper portion of the body wall and showing the metal ply imbedded therein;

Figure 4 is a verical sectional view through the bottom portion of the container showing thte body wall and bottom heading joined by a liquid tight beading; `and Figure 5 is a View in horizontal section through the completed wall of a portion of the container.

In my prior 'application Serial No. 204,007, led January 2, 1951, patented December 7, 1954, No. 2,696,340, there is shown a heavy duty fiber drum of large capacity which is especially adapted for storing and shipping of liquid and semi-liquid products. In order to strengthen the bottom heading and provide a liquid tight connection of the heading to the body wall, a metal tray is incorporated in the bottom heading and is rolled with the body wall and the bottom chime into a very tight bead abutting the bottom end of the container. The body wall of the container of my prior application is made 'solely of iber board and is liable -to being punctured or ruptured during shipping.

The present invention has to do with a means for strengthening the body wall and for preventing rupturing or puncturing thereof during shipping. The body wall of the drum is built up to ra suitable thickness of fiber board by convolutely Winding a sheet of ber board int-o a cylindrical shape of proper dimensions and thickness to form the body wall of the improved fiber drum.

in Figure l, Ia `cylindrical body member is shown in vertical section. It consists of a series of inner plies 1, a series of outer plies 2, and a metal ply 3, all formed into one unitary convolute structure.

ice

In Figure 2 of the drawings there is shown diagrammatically the preferred method of making this cylindrical body and the imbedding of a met-al ply in the body. The metal sheet 4 is attached to the ber board sheet 5 which is fed in to form the rst ply or plies by means of an adhesive or by means of adhesive tape 6 and the last ply or plies o iber board 7 are att-ached to this metal sheet by `a tape 8. ln other words the ply of metal is inserted somewhere in the fiber sheet used for winding the drum and attached to it so that the entire unit making up the side wall can be wound and glued into place as one continuous sheet. If this sheet were not attached to the paper board it would be very difficult to cause it to adhere to any previous plies placed on the mandrel or the succeeding plies without obtaining blisters inasmuch as there is no constant tension as the plies are convolutely wound. The metal sheet 4 is preferably a sheet of steel of comparatively light gauge. It extends from one end of the formed cylinder to the `other and is of rsutlicient length to constitute at least one ply or convolution.

This cylinder wall is used in the making up of the im proved heavy duty'ber drum. The usual chime '9 is applied to the upper end of the cylindrical body after which the body wall is beaded inwardly as indicated at 10 and the chime is rolled over the upper edge of the body wall as indicated at 11 in Figure 3.

The bott-om heading is preferably preformed and includes a filler disk 12, a liner 13 and a metal tray 14. A protective covering 1'5 of moisture resisting material may also form a part of the bottom heading. A's shown in the drawings, the body wall is provided with a liner 16. When a liner is used it may be coated with a liquid resisting material such as polyethylene or any other type of coating which will resist the liquid materials which are to be packaged and which are also strong and flexible enough to withstand the final forming of the body 'as well as shipping abuses. The lining 13 of the bottom heading may be made of similar liquid resisting material. This bottom heading, as illustrated, is similar to the bottom heading illustrated in my prior patent supra and is attached to the body wall in the manner shown and described in said application. A metal chime 17 is placed on the body portion after which the chime, body wall and the flanges of -the bottom heading are all rolled into a very tight bead 18 which is forced against the bottom heading and clamps the same tightly against the shoulder 19 formed by inwardly beading the chime 17 and the body wall.

The metal ply 3 imbedded in the body wall extends upwardly in the chime 9 at the upper end-of the drum and it also extend-s downwardly and in-to the bead 18 at the lower end of the drum. This interlocking of the flange of the bottom heading with the metal ply of the body wall in the bead 1S makes a very strong container which is puncture proof and `especially adapted for storing and shipping liquids or semi-liquids.

It is obvious that minor changes in the details of construction rnay be made without departing from the spirit of the invention as yset forth in Athe appended claim.

I claim:

A heavy duty fiber drum including a convolutely wound body wa'll comprising a sheet of iiber board forming one or more inner plies yof the body Wall, a sheet of liber board forming one or more outer plies of the body wall and a sheet of light gauge steel forming at least one ply of the body wall, said ply of steel being disposed between the inner ply or plies of liber board and the outer ply or plies of fiber board, said plies of liber board and steel being in end to end relation and in intimate `contact and glued together in a single puncture proof body unit, a bottom heading fitting within vsaid body wall `and secured thereto by rolling the body Wall into a holding bead, said sheet of steel in the body wall extending from end to end of the body wall and into said 4holding bead, said bottom heading having a tray of steel provided with a ange extending into and interlocking with the metal ply of the body wall in said holding bead.

References Cited in the file of this patent UNITED STATES PATENTS 

